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December 23, 2014

December 23, 2014

Posted by **jenn** on Wednesday, March 30, 2011 at 10:05pm.

If the locomotive can exert a constant pull

of 4.9×105 N, how long does it take to increase

the speed of the train from rest to 74 km/h?

Answer in units of min.

- physics -
**bobpursley**, Wednesday, March 30, 2011 at 10:48pmF=ma

a=F/m

vf=at

t= vf/a=vf*m/Force

change vf to m/s, and you have it.

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